Ignition tester



April 20 ,"1926.

Y W. V. MOORE IGNITION TESTER Filed Oct. 23, 1924 INVENTOR llillzam' 1471mm,

=ml uwiml ud x IIIIIIIIIIIIIIIIIIQ ATTORNEYS Patented Apr. 20, 1926.

UNITED STATES 1,581,976 PATENT OFFICE."

WILLIAM V. MOORE, OI NEW YORK, N. Y., ASSIGNOB O1 ONE-HALF TO JOHN J. HAITI- GAN, 01 NEW YORK, N. Y.

IGNITIOIQ' TESTER.

Application filed October 28, 1924. Serial No. 745,4?5.

To all whomit may concern:

Be it known that I, \VlLLIAM V.. Moore, a citizen of the United States, and a resident of the city of New York, borough of Manhattan, in the county and State of New York. have invented a new and Improved Ignition Tester, of which the following is a full. clear, and exact description.

This invention relates to ignition testerstor internal combustion engines and partie ularly to unimproved device to be vused on an automobile.

The object of the invention is to provide an improved testing structure which may be positioned so that the control will be on the dashboard of the automobile or at some other convenient point, the control being so formed that any one cylinder may be tested.

Another object of the invention is to provide a tester in which a controlling switch structure is presented including a sliding contact associated with whereby the contact may be moved opposite coacting contacts connected to the respective plugs of the engine.

A still further ob ect of the invention is to provide an ignition tester for internal Figure 4 is a sectional view "through,

Figure 2, approximately on line 4-4. 1 Figure 5 is a sectional view through Figure 3, approximately on line 5-5.

Figure 6 is, a transverse sectional view through Figure 2, approximately on line Figure 7 is a fragmentary top plan view similar to the lower half of Figure 2 but showing a slightly modified construction.

Figure 8 is a transverse sectional view through Figure 7 approximately on line Referring to the accompanying drawing by numerals, 1 indicates an internal comguiding means 7 the contacts 4, 5, 6, 7, S and 9. These contacts and associated parts form a control structure 10, which structure also includes a face plate 11 of metal and a body 12 preferably of insulating material. A transparent window 13 is provided in back of the opening 14 in plate 11, said transparent window covering the various contacts 4 to 9 inclusive, as well as a shiftable contact 15. The shiftable contact 15 is bent at 16 and extends upwardly through the slot 17 in plate 11, the upper end bemg adapted to receive a knob 18 of insulating material whereby the contact may be readily shifted. A spring 19 is provided for normally holding the collar 20, which is rigidly secured to the contact 15, against the plate 11. A loosely mounted washer 21 surrounds the contact 15 and is arranged between the plate 11 and sprin 19 whereby the parts may be readily slid back and forth along the slot 17 and the contact may be also swung back and forth so as to be moved outof proximity with any of i to 9 as it is moved along the slot 17. By reason of this construction and does not occur, it is proof that the spark plug has not functioned. Bymoving the contact 15 to the next contact or any other contacts between 4 to 9, the plugs assoarrangement, the spark plug of any cylinder ciated therewith maybe tested. The contact 15 may be moved downwardly while pointing toward the various contacts 4 to 9' or may be swun around so as to be parallel with the slot 1 and then move opposite the desired contact, after which, it may be turned to be "brought into proximity thereto.

In this way, the various plugs may be tested successively or any one plug tested independently. It will be noted that the spring 19 will substantially lock the contact 15 in any of its adjusted positions so that; it will not accidentally come opposite any of the other )arts.

I In Figures 7 and 8, a slightly modified construction is shown wherein a contact 15' is provided secured to a block of metal 22 which loosely fits against the wall 23 and adjacent the bottom 24. As this block is rectangular, it cannot rotate but may freely slide. This block is provided with a threaded extension 25 extending through the slot 17 whereby the knob 18 may be applied readily thereto and the block slid back and forth as contact 15' comes opposite any of the contacts 4 to 9. Inthis form of the invention, the contact 15 cannot rotate or rock but must be brought successively past the various contacts 4 to 9.

What I claim is 1. In an ignition tester of the character described, a body, a plurality of contacts arranged in a row carried by said body, a grounded plate mounted on said body and provided with a slot parallel with said contacts, and an auxiliary contact slidingly mounted in said slot, said auxiliary contact engaging said plate and projecting toward the other contacts so that as it is moved along the slot it may be brought successively into proximity to the other contacts.

2. In an ignition tester for internal combustion engines, a body, a plurality of contacts arranged in a row, a grounded metallic plate carried by the body and provided with a slot extending parallel to said contacts, an auxiliary contact extending through said slot and then at right angles to a plane parallel .with but spaced from the first mentioned contacts,.and resilient means for locking said auxiliary contact at any point along said slot;

3. In an ignition tester for internal combustion engines, a plurality of contacts arranged in a straight line, a rotatingand sliding contact co-acting therewith, means for guiding said rotating and sliding contact so that it may be moved to a position op posite any of the other contacts, and means for temporarily locking said sliding and rotating contact in different adjusted positions. v

4. In an ignition tester of the character described, a body, a plurality of contacts arranged in a "row carried by said body, a grounded contact plate mounted on said body and extending parallel with said contacts, and an auxiliary contact slidingly mounted on said grounded plate, said auxiliary contact engaging said plate and projecting toward the other contacts so that as it is moved along the plate it may be brought successively into proximity to the other contacts.

WILLIAM V. MOORE. 

